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This class 800 Sharpe valves 34836 series stainless steel 316L gate valve has an outside stem, lockable oval handle, and socket weld connections on both ends. It has a bolted bonnet, and stainless steel 316L construction provides strength and greater ease in welding than stainless steel 304. The lower carbon content of the material minimizes harmful carbide precipitation due to welding, ensuring corrosion resistance. The outside stem and yoke moves up and down with the gate, providing a visual signal (when extended) that the valve is open. The stem, which rises through bushing in the handwheel, is kept out of the flow to avoid corrosion and extend valve life. The outside stem makes it easy to lubricate threads for smoother movement. This valve has socket-weld ends with for connecting to unthreaded pipe ends. The joined pieces are welded together to create a tight seal against leaks. Mounted on top of the valve, a manually operated hand wheel activates the inside screw mechanism, which lifts and lowers the gate to start and stop the flow between the connected pipes. The hand wheel is lockable to prevent the valve from being opened or closed accidentally. This gate valve meets American Society for Testing and Materials (ASTM) A182 standards for quality assurance.
Gate valves control flow in a piping system by lifting a gate out of the path of steam, fluids, or gases. They are designed to block or permit flow, as the vibrations and force of flow repeatedly striking a partly lowered gate can damage the gate and seats. To accommodate different flows and pressure requirements, gates come in four types: solid wedge (appropriate for almost all liquid service), flexible wedge (appropriate for steam service), split wedge (appropriate for normal temperature, non-condensing gas and liquid service, including corrosive service), and parallel disc (appropriate for high and low pressure applications). Hand wheels or levers activate the screw mechanism in the valve’s bonnet, which comes in various designs, to open and close the gate. Union bonnets are preferable for building service piping, threaded-in (or screw-in) bonnets work well for lighter-duty usage, and bolted body-bonnet connections are used primarily in iron multi-turn valves. Most gate valves have either a rising stem, which moves up and down with the gate, or a non-rising stem, which remains fixed in place. When closed, the gate and its seats form tight planar sealing surfaces, ideal for linear liquid flow. Gate valves are used in air, gas, liquid, and steam applications.
Sharpe Valves manufactures a wide variety of valves, including stainless and carbon steel ball, gate, globe, and check valves. The company, founded in 1986 and headquartered in Chicago, IL, meets International Organization for Standardization (ISO) 9001:2008 standards based on Sharpe's design and manufacturing of valves.
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